Quantum,
that's a great idea brother. we must be brothers from another mothers. never knew your thread existed...until I posted one of my own. then some killjoy, lol, had to let me in on the secret...another fan powered light mover...
nice idea to use a lever. a stationary fan, with a rod welded to the center, of one of those 'grandpappy' fans, metal, could run belts or pullies(ys?), made to move the light...in greater distances. of course, more $ and effort would be needed, lol. fts!
anyway, I make a link, to your thread, in mine...and vice versa.
hope you stop by and share any ideas you have.
https://www.rollitup.org/grow-room-design-setup/155955-wind-powered-rotating-dual-hid.html
does your fan still function as a fan...blowing air around the room?
my design works like a windmill, blown by the fan, connected to the ceiling, swinging
more than 6ft, in a semi-circle...180 degrees, then back again...to start all over.